In this brief manual, I will describe the most simple way of setting up and use of "Opti MozJpeg Guetzli WebP" plugin for WordPress. First install the plugin. Stable version is available in WordPress's plugins repository. Latest beta version is here Next install Oracle VirtualBox. It is the free virtual computer emulator. (www.virtualbox.org) Then download my virtual machine. It contains Linux, ssh server and encoders...